CN110703381A - Preparation method of optical fiber panel - Google Patents
Preparation method of optical fiber panel Download PDFInfo
- Publication number
- CN110703381A CN110703381A CN201910894905.0A CN201910894905A CN110703381A CN 110703381 A CN110703381 A CN 110703381A CN 201910894905 A CN201910894905 A CN 201910894905A CN 110703381 A CN110703381 A CN 110703381A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- section
- blank
- waste
- multifilament
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
- G02B6/06—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres the relative position of the fibres being the same at both ends, e.g. for transporting images
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
The invention discloses a preparation method of an optical fiber panel, which comprises the steps of tightly stacking a plurality of optical fiber multifilaments into a columnar core section, tightly stacking a plurality of replacement filaments on the outer side of the core section to form a waste section capable of wrapping the core section, forming a blank assembly by the waste section and the core section, and removing the waste section after the blank assembly is pressed and formed. The invention wraps a plurality of alternative yarns outside a core section consisting of the optical fiber multifilament to be formed by common melt-pressing, and then removes a waste section formed by the alternative yarns to obtain the optical fiber panel. The finished product quality of the optical fiber panel is guaranteed, meanwhile, the phenomenon that optical fiber multifilaments in waste sections are wasted in the prior art is avoided, the material loss of the optical fiber multifilaments in the preparation process is reduced, the manufacturing period is shortened, and the effects of cost reduction and efficiency improvement are achieved.
Description
Technical Field
The invention relates to a preparation method in the technical field of optical fibers, in particular to a preparation method of an optical fiber panel.
Background
The high-performance optical fiber panel (hereinafter referred to as optical fiber panel) is an optical fiber element formed by processing thousands of optical fibers which are regularly and closely arranged through the procedures of plate arrangement, hot melt pressing, annealing, rough machining, finish machining and the like, and has the characteristics of high light transmission efficiency, small interstage coupling loss, clear and real image transmission, zero thickness and the like in optics. Fiber optic panels are widely used in various cathode ray tubes, camera tubes, CCD couplings, and other instruments and devices that require the transmission of images.
The existing manufacturing process of the optical fiber panel mainly comprises the following steps:
firstly, drawing the composite filament. And sleeving and combining the fiber core glass rod and the fiber skin glass tube, and drawing at a high temperature on drawing equipment to obtain the single optical fiber. Then, single optical fiber is combined and drawn for many times, and finally the composite optical fiber meeting the requirements is obtained.
And secondly, arranging and combining the composite optical fiber filaments. And cutting the composite optical fiber at a fixed length, and then orderly arranging and combining in auxiliary equipment. And after the arrangement and the combination are finished, fixing the composite light filament assembly in the direction vertical to the optical fibers in a bundling mode and the like. The shape and size of the final composite filament assembly must match the shape and size of the internal cavity of the hot melt die.
And thirdly, high-temperature pressing and forming of the optical fiber panel blank. And (4) putting the composite optical fiber filament assembly into a hot-melt pressing mold forming cavity, and then completing the assembly of the rest parts of the mold. And then putting the whole die into a hot melting furnace for heating and heat preservation. And (3) performing air exhaust treatment on the hot-melt pressing furnace in a high-temperature environment of 600-800 ℃, applying pressure in a specific direction to the die by using hydraulic equipment, pushing the die part to extrude the discrete optical fiber multifilament to perform high-temperature polymerization, and forming an optical fiber panel blank.
And fourthly, optical processing of the optical fiber panel finished product. And processing the optical fiber panel blank by cutting, milling, polishing and other modes to obtain the finished optical fiber panel.
As known from the process flow, the optical fiber panel blank is formed by polymerizing the composite optical fiber filaments obtained after multiple combined drawing at high temperature. Because the finished product of the optical fiber panel is generally round, and the composite optical fiber at the periphery of the blank of the optical fiber panel deforms seriously in the high-temperature extrusion process and has poor image transmission effect, the waste sections at the periphery of the blank are removed by grinding in the subsequent optical processing. Referring to fig. 1, the waste section 12 of the periphery of the optical fiber panel blank is removed by grinding, which means that a part of the optical fiber multifilament 1 cannot be effectively utilized. Considering that the drawing time period of the composite optical fiber 1 is long and the processing raw materials are expensive, the process greatly improves the manufacturing cost of the optical fiber panel.
Disclosure of Invention
The invention aims to provide a preparation method of an optical fiber panel, which can reduce the manufacturing cost on the premise of ensuring the quality of the optical fiber panel.
The solution of the invention for solving the technical problem is as follows: a method for preparing optical fiber panel includes tightly stacking multiple optical fiber multifilaments into a columnar core section, tightly stacking multiple replacement filaments on outer side of the core section to form a waste section capable of wrapping the core section, forming a blank assembly by the waste section and the core section, and removing the waste section after the blank assembly is formed by pressing.
As a further improvement of the technical scheme, the method comprises the following steps:
A. putting and arranging the optical fiber multifilament and the alternative filament in an arrangement auxiliary die, and assembling the arrangement auxiliary die to enable a waste section formed by the alternative filament to tightly wrap a core section formed by the optical fiber multifilament to obtain a blank assembly;
B. fusing and pressing the blank assembly to obtain a molded optical fiber panel blank;
C. and demolding and annealing the optical fiber panel blank, and then machining to remove the waste section.
As a further improvement of the above technical solution, before step a, an optical fiber multifilament is prepared, and the preparation steps include: firstly, obtaining cylindrical single optical fiber yarns by combined drawing of a tube rod, then obtaining hexagonal prism-shaped primary composite optical fiber yarns by combined drawing of the single optical fiber yarns, and obtaining secondary composite optical fiber multifilaments by combined drawing of the primary composite optical fiber yarns, wherein the optical fiber multifilaments are hexagonal prism-shaped.
As a further improvement of the above technical solution, the substitute fiber is a single optical fiber or a glass rod, and the glass rod is cylindrical or hexagonal prism-shaped.
As a further improvement of the technical scheme, when the substitute yarn is a single optical fiber yarn or a cylindrical glass rod, the outer diameter of the substitute yarn is equal to the diameter of an inscribed circle of the cross section of the optical fiber multifilament.
As a further improvement of the above technical solution, when the substitute fiber is a hexagonal prism-shaped glass rod, the glass rod is hexagonal prism-shaped, and the cross-sectional dimension of the glass rod is the same as the cross-sectional dimension of the composite optical fiber.
As a further improvement of the above technical solution, in step a, both ends of the blank assembly extend out of the arrangement auxiliary dies, and both ends of the blank assembly are bound to fix the arrangement positions of the optical fiber multifilament and the substitute filaments.
In step B, the bound blank assembly is put into a melt-compression forming die for melt-compression forming.
As a further improvement of the technical scheme, the cross section color of the substitute yarn is different from that of the plain yarn multifilament.
The invention has the beneficial effects that: the invention wraps a plurality of alternative yarns outside a core section consisting of the optical fiber multifilament to be formed by common melt-pressing, and then removes a waste section formed by the alternative yarns to obtain the optical fiber panel. The finished product quality of the optical fiber panel is guaranteed, meanwhile, the phenomenon that optical fiber multifilaments in waste sections are wasted in the prior art is avoided, the material loss of the optical fiber multifilaments in the preparation process is reduced, the manufacturing period is shortened, and the effects of cost reduction and efficiency improvement are achieved.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.
FIG. 1 is a schematic cross-sectional view of a prior art fiber optic faceplate blank;
FIG. 2 is a schematic cross-sectional view of a blank of a fiber optic faceplate according to one embodiment of the invention;
fig. 3 is a schematic cross-sectional view of a fiber optic panel blank according to a second embodiment of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions.
Example one
The preparation method of the optical fiber panel in the embodiment selects the single optical fiber filament 2 as the substitute filament, and comprises the following steps:
firstly, preparing the optical fiber multifilament.
And drawing the tube rod combination to obtain a single optical fiber filament 2, drawing the single optical fiber filament 2 combination to obtain a hexagonal prism-shaped primary composite optical fiber filament, and drawing the primary composite optical fiber filament combination to obtain a hexagonal prism-shaped optical fiber multifilament 1.
And secondly, arranging and melt-pressing the optical fiber multifilaments.
A. The optical fiber multifilaments 1 and the single optical fiber filaments 2 are put and arranged in the arrangement auxiliary mold, and the arrangement position is shown in fig. 2. The single optical fiber 2 is manufactured in a short period, so that the efficiency of the whole manufacturing process can be improved.
The arrangement mode can be that the optical fiber multifilament 1 and the single optical fiber filament 2 are placed in the mould layer by layer from bottom to top; or a plurality of optical fiber multifilaments 1 are closely stacked into a columnar core section 11, a plurality of single optical fiber filaments 2 are uniformly wrapped on the outer side of the core section 11, and finally the arranged blank assembly is placed into a die.
And (3) extending the two ends of the optical fiber multifilaments 1 and the single optical fiber 2 out of the arrangement auxiliary die, and binding the two ends of the blank assembly before assembling the arrangement auxiliary die so as to relatively fix the positions of the optical fiber multifilaments 1 and the single optical fiber 2. Preferably, the length of the single optical fiber 2 is larger than that of the optical fiber multifilament 1, two ends of the optical fiber multifilament 1 are located in the arrangement auxiliary molds, two ends of the single optical fiber 2 extend out of the arrangement auxiliary molds, two ends of the waste section 12 in the blank combination body are bound, and the single optical fiber 2 is wrapped on the outer side of the core section 11, so that the position of the optical fiber multifilament 1 on the inner side of the waste section 12 is fixed when the single optical fiber 2 of the waste section 12 is bound tightly.
The diameter of the single optical fiber filament 2 is equal to the diameter of the inscribed circle of the optical fiber multifilament 1, so that the optical fiber multifilament 1 and the single optical fiber filament 2 can be tightly stacked. The single optical fiber filament 2 is made of the same material as the composite optical fiber 1, and the indexes such as the softening temperature interval, the thermal expansion coefficient and the like are relatively close, so that the optical fiber multifilament of the core section 11 cannot be influenced by using the single optical fiber filament 2 in the fusion pressing process.
B. And taking the blank assembly out of the arrangement auxiliary die, and putting the whole blank assembly into a melt-compression forming die. And (3) at the high temperature of 600-800 ℃, performing melt-pressing on the blank assembly to obtain a molded optical fiber panel blank, wherein the cross section of the optical fiber panel blank is in a regular hexagon shape.
C. And demolding and annealing the optical fiber panel blank, and then grinding to remove the waste section 12 in the optical fiber panel. Because the single optical fiber 2 has a great difference from the composite optical fiber 1 in light transmission performance, the cross sections of the single optical fiber 2 and the composite optical fiber 1 are different in color under the illumination condition, a light source can be arranged at one end of the optical fiber panel blank, the color presented at the other end of the optical fiber panel blank is observed to distinguish the boundary line of the core section 11 and the waste section 12, and the waste section 12 is removed by grinding.
Preferably, when the single optical fiber filament 2 having a length greater than that of the composite optical fiber 1 is selected in step a, the waste segment 12 can be directly ground and removed, because the waste segment 12 has a length greater than that of the optical fiber 1, the boundary between the core segment 11 and the waste segment 12 is easily distinguished.
Example two
In the preparation method of the optical fiber panel in the embodiment, the hexagonal prism-shaped glass rod 3 is used as a substitute fiber, and the preparation method comprises the following steps:
firstly, preparing the optical fiber multifilament.
And drawing the tube rod combination to obtain a single optical fiber filament 2, drawing the single optical fiber filament 2 combination to obtain a hexagonal prism-shaped primary composite optical fiber filament, and drawing the primary composite optical fiber filament combination to obtain a hexagonal prism-shaped optical fiber multifilament 1.
And secondly, arranging and melt-pressing the optical fiber multifilaments.
A. The optical fiber multifilaments 1 and the hexagonal prism-shaped glass rod 3 are placed and arranged in a mold, and the arrangement position is shown in fig. 3.
The arrangement mode can be that the optical fiber multifilament 1 and the glass rod 3 are put into the arrangement auxiliary die layer by layer from bottom to top; or a plurality of optical fiber multifilaments 1 are closely stacked into a cylindrical core section 11, a plurality of glass rods 3 are uniformly wrapped on the outer side of the core section 11, and finally the arranged blank assembly is placed into an arrangement auxiliary die.
And (3) extending the two ends of the optical fiber multifilament 1 and the glass rod 3 out of the arrangement auxiliary die, and binding the two ends of the blank assembly before assembling the arrangement auxiliary die so as to relatively fix the positions of the optical fiber multifilament 1 and the glass rod 3. Preferably, the length of the glass rod 3 is larger than that of the optical fiber multifilament 1, both ends of the optical fiber multifilament 1 are located in the arrangement auxiliary die, both ends of the single optical fiber filament 2 extend out of the arrangement auxiliary die, both ends of the waste section 12 in the blank binding assembly are wrapped on the outer side of the core section 11, and therefore, when the glass rod 3 of the waste section 12 is bound tightly, the position of the optical fiber multifilament 1 on the inner side of the waste section 12 is fixed.
The cross-sectional dimension of the glass rod 3 is the same as that of the optical fiber multifilament 1, so that the glass rod 3 can be spliced with the optical fiber multifilament seamlessly to ensure close packing. The softening temperature interval of the selected glass rod 3 is completely or partially overlapped with the softening temperature interval of the optical fiber multifilament 1, so that the glass rod 3 can be fully softened at high temperature and can be extruded and polymerized with the optical fiber multifilament 1. In addition, the thermal expansion coefficient of the glass rod 3 is close to that of the optical fiber multifilament 1, so that the optical fiber panel blank is prevented from being cracked due to overlarge thermal stress in the subsequent temperature rising and reducing processes.
B. And taking the blank assembly out of the arrangement auxiliary die, and putting the whole blank assembly into a melt-compression forming die. And (4) carrying out high-temperature fusion pressing on the blank assembly to obtain a molded optical fiber panel blank, wherein the cross section of the optical fiber panel blank is in a regular hexagon shape.
C. And demolding and annealing the optical fiber panel blank, and then grinding to remove the waste section 12 in the optical fiber panel. The glass rod 3 has larger difference with the composite optical fiber 1 in material and light transmission performance, so that the cross sections of the glass rod and the composite optical fiber are different in color, the boundary line between the core segment 11 and the waste segment 12 can be distinguished by observing the color presented by the end face of the optical fiber panel blank, and the waste segment 12 is removed by grinding.
Preferably, when the glass rod 3 having a length longer than that of the composite optical fiber 1 is selected in step B, the waste segment 12 can be directly ground and removed, because the waste segment 12 has a length longer than that of the optical fiber 1, the boundary between the core segment 11 and the waste segment 12 is easily distinguished.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention as set forth in the claims appended hereto.
Claims (9)
1. A preparation method of an optical fiber panel is characterized by comprising the following steps: tightly stacking a plurality of optical fiber multifilaments (1) into a columnar core section (11), tightly stacking a plurality of replacement filaments on the outer side of the core section (11) to form a waste section (12) capable of wrapping the core section (11), wherein the waste section (12) and the core section (11) jointly form a blank assembly, and processing and removing the waste section (12) after the blank assembly is pressed and formed.
2. The method of making a fiber optic faceplate of claim 1, comprising the steps of:
A. putting and arranging the optical fiber multifilament (1) and the alternative yarns in an arrangement auxiliary die, assembling the arrangement auxiliary die, and tightly wrapping a waste section (12) formed by the alternative yarns with a core section (11) formed by the optical fiber multifilament (1) to obtain a blank assembly;
B. fusing and pressing the blank assembly to obtain a molded optical fiber panel blank;
C. the fiber optic faceplate blank is de-molded and annealed and then machined to remove the scrap section (12).
3. The method of claim 2, wherein the optical fiber multifilaments are prepared before the step a, and the step of preparing comprises: firstly, cylindrical single optical fiber filaments (2) are obtained through combined drawing of a tube and a rod, then primary composite optical fiber filaments in a hexagonal prism shape are obtained through combined drawing of the single optical fiber filaments (2), secondary composite optical fiber multifilaments (1) are obtained through combined drawing of the primary composite optical fiber filaments, and the optical fiber multifilaments (1) are in a hexagonal prism shape.
4. The method of making a fiber optic faceplate of claim 1, 2, or 3, wherein: the substitute filament is a single optical fiber filament (2) or a glass rod (3), and the glass rod (3) is cylindrical or hexagonal prism-shaped.
5. The method of manufacturing a fiber optic faceplate of claim 4, wherein: when the substitute fiber is a single optical fiber (2) or a cylindrical glass rod (3), the outer diameter of the substitute fiber is equal to the diameter of an inscribed circle of the cross section of the optical fiber multifilament (1).
6. The method of manufacturing a fiber optic faceplate of claim 4, wherein: when the substitute fiber is a hexagonal prism-shaped glass rod (3), the cross-sectional dimension of the glass rod (3) is the same as that of the composite optical fiber.
7. The method of manufacturing a fiber optic faceplate of claim 2, wherein: in the step A, both ends of the blank assembly extend out of the arrangement auxiliary dies, and both ends of the blank assembly are bound to fix the arrangement positions of the optical fiber multifilament (1) and the substitute filaments.
8. The method of making a fiber optic faceplate of claim 7, wherein: and B, putting the bound blank assembly into a melt-compression forming die, and carrying out melt-compression forming.
9. The method of manufacturing a fiber optic faceplate of claim 2, wherein: the cross-sectional color of the alternative filament is different from the cross-sectional color of the plain multifilament.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910894905.0A CN110703381B (en) | 2019-09-20 | 2019-09-20 | Preparation method of optical fiber panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910894905.0A CN110703381B (en) | 2019-09-20 | 2019-09-20 | Preparation method of optical fiber panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110703381A true CN110703381A (en) | 2020-01-17 |
| CN110703381B CN110703381B (en) | 2021-01-26 |
Family
ID=69195879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910894905.0A Active CN110703381B (en) | 2019-09-20 | 2019-09-20 | Preparation method of optical fiber panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110703381B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100316345A1 (en) * | 2009-04-20 | 2010-12-16 | Michael Wentworth | Fiber optic panel and method |
| CN202383318U (en) * | 2011-12-19 | 2012-08-15 | 中国建筑材料科学研究总院 | 4mu optical fiber panel |
| CN103529512A (en) * | 2013-10-21 | 2014-01-22 | 中国建筑材料科学研究总院 | Method for manufacturing square-filament optical fiber panel |
| CN105259611A (en) * | 2015-09-10 | 2016-01-20 | 广州宏晟光电科技有限公司 | Manufacturing method of fingerprint acquisition optical fiber panel |
| US20160109676A1 (en) * | 2014-10-20 | 2016-04-21 | Corning Optical Communications LLC | Convertible fiber optic panel/module assemblies for optical fiber connectivity, including for wall and floor-mounted connectivity applications |
| CN108663747A (en) * | 2018-04-25 | 2018-10-16 | 中国建筑材料科学研究总院有限公司 | Fibre faceplate and preparation method thereof |
-
2019
- 2019-09-20 CN CN201910894905.0A patent/CN110703381B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100316345A1 (en) * | 2009-04-20 | 2010-12-16 | Michael Wentworth | Fiber optic panel and method |
| CN202383318U (en) * | 2011-12-19 | 2012-08-15 | 中国建筑材料科学研究总院 | 4mu optical fiber panel |
| CN103529512A (en) * | 2013-10-21 | 2014-01-22 | 中国建筑材料科学研究总院 | Method for manufacturing square-filament optical fiber panel |
| US20160109676A1 (en) * | 2014-10-20 | 2016-04-21 | Corning Optical Communications LLC | Convertible fiber optic panel/module assemblies for optical fiber connectivity, including for wall and floor-mounted connectivity applications |
| CN105259611A (en) * | 2015-09-10 | 2016-01-20 | 广州宏晟光电科技有限公司 | Manufacturing method of fingerprint acquisition optical fiber panel |
| CN108663747A (en) * | 2018-04-25 | 2018-10-16 | 中国建筑材料科学研究总院有限公司 | Fibre faceplate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110703381B (en) | 2021-01-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3215029A (en) | Fiber optical image transfer devices and method of making the same | |
| US4116655A (en) | Method for making optical-fibre cables | |
| CN202383318U (en) | 4mu optical fiber panel | |
| US3204326A (en) | Multi-element energy-conducting structures and method of making the same | |
| CN203616499U (en) | 4 mu optical fiber image inverter | |
| CN106772791B (en) | Low stray light crosstalk type fibre optic image transmission element and preparation method thereof | |
| CN113866874B (en) | Polymer optical fiber panel, manufacturing method and large-area polymer optical fiber panel | |
| CN105259611A (en) | Manufacturing method of fingerprint acquisition optical fiber panel | |
| JPH06317714A (en) | Anamorphic fused optical fiber bundle | |
| CN101419308A (en) | Big section optical fiber image transmission bundle | |
| CN109143516B (en) | A kind of embedded draw of sheath connects optical cable and production method | |
| CN106626447A (en) | Pultrusion device and pultrusion process for thermoplastic substrate layer production | |
| CN110703381B (en) | Preparation method of optical fiber panel | |
| CN106569295A (en) | Lobster eye optical imaging mirror and preparation method thereof | |
| JP3436743B2 (en) | Optical fiber | |
| CN111025453B (en) | Optical fiber taper and manufacturing method thereof | |
| CN111892291B (en) | Extrusion preparation method of all-solid-state photonic crystal fiber preform | |
| CN1058215C (en) | Optical fibre cable and method of manufacture | |
| CN104154370A (en) | Petrochemical storage tank pipe joint and manufacturing method thereof | |
| US3373006A (en) | Apparatus for making fiber optical image transfer devices | |
| CN108061934B (en) | Manufacturing method of curved panel | |
| CN117486482A (en) | High-uniformity optical fiber panel and preparation method and application thereof | |
| JP5598488B2 (en) | Manufacturing method of fluoride image guide | |
| CN109725383A (en) | A kind of method and its fusion pressure furnace for making large-size fiber optic faceplate | |
| JP2519699B2 (en) | Optical fiber bundle manufacturing method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |